28828871 has 8 divisors (see below), whose sum is σ = 31393200. Its totient is φ = 26369280.

The previous prime is 28828861. The next prime is 28828901. The reversal of 28828871 is 17882882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28828871 is a prime.

It is a super-2 number, since 2×28828871² = 1662207606269282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28828801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25610 + ... + 26711.

It is an arithmetic number, because the mean of its divisors is an integer number (3924150).

Almost surely, 2^28828871 is an apocalyptic number.

28828871 is a deficient number, since it is larger than the sum of its proper divisors (2564329).

28828871 is a wasteful number, since it uses less digits than its factorization.

28828871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52369.

The product of its digits is 114688, while the sum is 44.

The square root of 28828871 is about 5369.2523688126. The cubic root of 28828871 is about 306.6261652299.

The spelling of 28828871 in words is "twenty-eight million, eight hundred twenty-eight thousand, eight hundred seventy-one".